Traction motor shaft connected to vehicle ground via drive gear
In order to prevent bearing currents, particularly in converter-operated traction motors ( 1 ), the housing ( 11 ) is grounded via a grounding capacitor (C ground ).
1. A traction drive system in a vehicle with an electric or diesel-electric drive, said vehicle representing a system ground potential, the drive system comprising:
a housing capacitively coupled to ground potential;
a traction motor received in the housing, said traction motor comprising a rotor shaft connected to ground potential via a drive gear and capacitively coupled to the housing, and a stator capacitively coupled to the housing and to ground potential; and
at least one grounding capacitor connected between the housing and ground potential.
2. The traction drive system of claim 1 , further comprising an electronic power actuating element for supply of power to the traction motor.
3. The traction drive system of claim 1 , further comprising a rotational speed sensor for realizing a grounding connection between the housing and a vehicle ground.
4. The traction drive system of claim 1 , further comprising a power cable for supply of power, and a shielding on the power cable for realizing a grounding connection between the housing and a vehicle ground.
5. The traction drive system claim 1 , further comprising a converter for realizing a grounding connection between the housing and a vehicle ground.
6. The traction drive system of claim 5 , further comprising a power cable for supply of power, wherein the grounding connection is realized via a separate line in the power supply cable.
7. The traction drive system claim 1 , further comprising a motor shaft operated by the traction motor, and a bearing for support of the motor shaft, wherein the grounding capacitor monitors an electrical voltage across the bearing to generate a measured variable of an operative grounding connection.
8. The traction drive system of claim 5 , further comprising a power cable for supply of power, and a shielding on the power cable, wherein the grounding connection is realized via the shielding of the power cable.